diff --git a/doc/EthernautCTF.md b/doc/EthernautCTF.md
index fe5194a..a5f40d4 100644
--- a/doc/EthernautCTF.md
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@@ -20,7 +20,7 @@
 | 16  | [Preservation](../src/EthernautCTF/Preservation.sol) (\*)  |  ✅  | [PreservationExploit](../test/EthernautCTF/PreservationExploit.t.sol)   | Make use of the `delegatecall` to overwrite the storage of the main contract. This time it involved a bit more creativity as it required to overwrite an address (20 bytes) using a uint256 (32 bytes).                                                                                                                         |
 | 17  | [Recovery](../src/EthernautCTF/Recovery.sol)               |  ✅  | [RecoveryExploit](../test/EthernautCTF/RecoveryExploit.t.sol)           | The address of an Ethereum contract is deterministically computed from the address of its creator (sender) and its nonce (how many transactions the creator has sent). The sender and nonce are RLP-encoded and then hashed with keccak256. For a Solidity implementation, check the exploit code.                              |
 | 18  | [MagicNumber](../src/EthernautCTF/MagicNumber.sol)         |  ✅  | [MagicNumberExploit](../test/EthernautCTF/MagicNumberExploit.t.sol)     | - Use raw bytecode to create the smallest possible contract.<br>- Learn about initialization code to be able to run any runtime code.<br>- Learn about `create` to create a contract from the initialization code.                                                                                                              |
-| 19  | AlienCode                                                  |  ❌  |                                                                         | The challenge requires to use solidity version `^0.5.0` but unfortunately, the minimum version supported by [forge-std](https://github.com/foundry-rs/forge-std) is `0.6.2`. Thus, the solution of this challenge won't be part of this repository.                                                                             |
+| 19  | AlienCode                                                  |  ❌  | [AlienCodeExploit](../test/EthernautCTF/AlienCodexExploit.t.sol.txt)    | The challenge requires to use solidity version `^0.5.0` but unfortunately, the minimum version supported by [forge-std](https://github.com/foundry-rs/forge-std) is `0.6.2`. Thus, the solution of this challenge won't be part of this repository.                                                                             |
 | 20  | Denial                                                     |  ❌  |                                                                         |                                                                                                                                                                                                                                                                                                                                 |
 | 21  | [Shop](../src/EthernautCTF/Shop.sol)                       |  ❌  |                                                                         |                                                                                                                                                                                                                                                                                                                                 |
 | 22  | Dex                                                        |  ❌  |                                                                         |                                                                                                                                                                                                                                                                                                                                 |